摘要:
企鹅很忙系列~(可惜只会做3道题T_T)A -ATime Limit:2000MSMemory Limit:262144KB64bit IO Format:%I64d & %I64uSubmitStatusPracticeCodeForces 289ADescriptionLittle penguin Polo adores integer segments, that is, pairs of integers[l;r](l ≤ r).He has a set that consists ofninteger segments:[l1;r1], [l2;r2], ..., [ln;r
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